birds footprints silhouettes set on white background, such as idea of logo in gray. owl, duck, sparrow, dove

owl duck sparrow dove footstep mark wildlife long away silhouette nature bird print footpath clip birds label flat web icon background tracking pawprint pitch walking graphic step gray walk wild paw pet track trace pattern puppy footprint cartoon shape foot vector trail texture design isolated symbol animal people footprints silhouettes set white idea logo prints eps10 gray